Panasonic has developed a flexible lithium-ion battery with a thickness of only 0.55 mm, or about 0.022 inches. Card devices, which are often carried in wallets or pockets, require internal components that can withstand bending and twisting. Slim lithium-ion batteries are used in such devices, but these batteries can degrade when they are bent or twisted, resulting in shorter operating time for the devices. The battery contributes to longer life of devices as it retains charging and discharging characteristics even with repeated bending and twisting.Panasonic flexible lithium-ion battery retains its characteristics during bending and twisting tests with severer conditions required by card application standards. The battery can maintain more than 99% of its initial capacity after 1,000 bends with a radius of 25mm, or after twisted 1,000 times with an angle ±25°/100mm, thanks to a newly developed laminated outer layer and newly developed internal structure. Panasonic’s new flexible battery can withstand bending and twisting beyond the Japanese Industrial Standards for identification cards.Panasonic flexible lithium-ion battery uses newly-developed laminated outer body and internal structure that make it difficult to cause leakage and abnormal heating during repeated bending and twisting. That makes this battery reliable and safe for use in wearable and body attached devices. Panasonic flexible lithium-ion battery will be on display at CEATEC JAPAN 2016 from October 4 to 7 at Makuhari Messe. Sample shipments are scheduled to start by the end of October 2016.